Does IUI implantation bleeding mean pregnancy?

Ok.. Here Goes.. I had a tubal reversal on December 13th 2006, I’m 43 years old and the surgery was a success. No problems, lots of tube etc. My cycle went back to normal after the surgery. On April 15th my cycles started (nothing out of ordinary) (28 day cycle like clock work) - I had an ultrasound on the 27th of April and doc pinpointed ovulation for the following Monday, April 30th – I had an in office IUI (intra-uterine insemination) done on the 30th of April during pinpointed ovulation. On May 7th I noticed very light bleeding (kind if pinkish red) – this is seven days after ovulation and IUI and roughly seven days before my next expected period… I’ve never had, or dont ever recall anyway, having implantation bleeding with my past five pregnancies, is it possible that this is implantation bleeding? ~ It’s been 14 years since my last pregnancy so I am a little bit rusty at all this stuff… I’m really trying to reserve my hopes and disappointments at this moment.

Sorry if its TMI but, I have found myself both “excited” and “scared” “disappointed” and “still hopeful” ~ Very frankly, I’m a total mess this morning because I just don’t know what to think. I’m not even sure when I should start taking home pregnancy tests – I had anticipated taking a test on the 14th of May, when my cycle would be one day late… Now.. I’m not even sure of that… Yipes Ladies! Can you fill me in, help me out?